2020-12-19 sort() sorted()

字符串的降序

输入：数字或字符串
输出：降序后的数字

How to convert and sort?

step1： str()
step2：sorted()
step3：''.join()
step4: int()

def descending_order(num):
    return int(''.join(sorted(str(num),reverse=True)))
num = 123456789
#num = '123456789'
print(descending_order(num))

num = ['9', '8', '7', '6', '5', '4', '3', '2', '1']
print(max(num),min(num))